263
FNCA52 TJSJ 111930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST THU JUN 11 2026
DISCUSSION
EXPECT A LOW FIRE WEATHER RISK ACROSS THE SOUTHERN SECTIONS OF
THE ISLANDS THROUGH AT LEAST FRIDAY. HOWEVER, BY SATURDAY, A DRY
AIR MASS IS EXPECTED TO MOVE OVER THE FORECAST AREA, POTENTIALLY
LOWERING RELATIVE HUMIDITY VALUES TO NEAR OR BELOW CRITICAL
THRESHOLDS ACROSS THE SOUTHERN COASTAL PLAINS, AND POSSIBLY
EXTENDING INTO OTHER AREAS.
ADDITIONALLY, BREEZY CONDITIONS ARE EXPECTED TO RETURN ON
SATURDAY. COMBINED WITH ABOVE-CRITICAL KBDI VALUES AND
INCREASINGLY DRY FUELS, THIS COULD LEAD TO ELEVATED FIRE DANGER
CONDITIONS. THEREFORE, CONDITIONS MAY BECOME FAVORABLE FOR THE
SPREAD OF WILDFIRES ALONG THE SOUTHERN COASTAL PLAINS OF PUERTO
RICO ON SATURDAY, AND A FIRE DANGER STATEMENT (RFDSJU) MAY BE
NECESSARY.
PRZ014-120800-
SOUTHEAST COASTAL PLAINS-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 10 10
TEMP (24H TREND) 73 (-1) 90 (+1) 73 92
RH % (24H TREND) 90 (+9) 54 (-5) 89 45
WIND 20FT/EARLY(MPH) E 12 E 14 E 12 E 19
WIND 20FT/LATE(MPH) E 10 SE 17 E 14 E 19
MIXING HGT(FT-AGL/MSL) 4890 4790
TRANSPORT WND (MPH) E 16 E 21
VENT RATE (KT-FT) 68460 86220
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-120800-
SOUTHERN HILLS-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20 10
TEMP (24H TREND) 69 (-3) 87 (+3) 70 88
RH % (24H TREND) 99 (+10) 64 (-5) 97 57
WIND 20FT/EARLY(MPH) E 11 E 12 E 11 E 14
WIND 20FT/LATE(MPH) E 10 SE 12 E 13 E 14
MIXING HGT(FT-AGL/MSL) 5350 5230
TRANSPORT WND (MPH) SE 15 E 20
VENT RATE (KT-FT) 69550 88910
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-120800-
NORTH COASTAL PLAINS-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30 30
TEMP (24H TREND) 72 (-2) 91 (+2) 73 92
RH % (24H TREND) 99 (+9) 60 (-7) 96 56
WIND 20FT/EARLY(MPH) SE 11 E 13 SE 14 E 16
WIND 20FT/LATE(MPH) SE 10 E 14 SE 13 E 20
MIXING HGT(FT-AGL/MSL) 5300 5270
TRANSPORT WND (MPH) SE 14 E 18
VENT RATE (KT-FT) 63600 84320
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-120800-
NORTHERN HILLS-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 30 40
TEMP (24H TREND) 70 (-1) 90 (+3) 70 90
RH % (24H TREND) 99 (+6) 64 (-1) 97 58
WIND 20FT/EARLY(MPH) SE 9 E 11 SE 12 E 13
WIND 20FT/LATE(MPH) SE 5 E 13 SE 8 E 18
MIXING HGT(FT-AGL/MSL) 6000 6470
TRANSPORT WND (MPH) SE 10 SE 15
VENT RATE (KT-FT) 54000 84110
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-120800-
WEST COAST-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30 10
TEMP (24H TREND) 73 (-1) 91 (+1) 72 92
RH % (24H TREND) 98 (+7) 63 (0) 96 57
WIND 20FT/EARLY(MPH) E 12 E 14 SE 13 E 17
WIND 20FT/LATE(MPH) E 11 SE 16 E 16 E 17
MIXING HGT(FT-AGL/MSL) 4290 5300
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 38610 74200
DISPERSION 5 5
DSI 4 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-120800-
EASTERN INTERIOR-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 30 10
TEMP (24H TREND) 71 (-2) 88 (+2) 71 89
RH % (24H TREND) 99 (+8) 63 (-6) 98 58
WIND 20FT/EARLY(MPH) SE 13 SE 13 SE 12 E 16
WIND 20FT/LATE(MPH) SE 12 SE 13 SE 14 E 16
MIXING HGT(FT-AGL/MSL) 5450 5400
TRANSPORT WND (MPH) SE 15 SE 20
VENT RATE (KT-FT) 70850 91800
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-120800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30 30
TEMP (24H TREND) 69 (-2) 83 (+3) 69 85
RH % (24H TREND) 100 (+5) 69 (-10) 99 64
WIND 20FT/EARLY(MPH) SE 11 SE 11 SE 10 E 14
WIND 20FT/LATE(MPH) SE 10 SE 12 SE 12 E 14
MIXING HGT(FT-AGL/MSL) 4720 4730
TRANSPORT WND (MPH) SE 17 SE 21
VENT RATE (KT-FT) 70800 85140
DISPERSION 5 5
DSI 5 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-120800-
CENTRAL MOUNTAIN RANGE-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 50 30 30
TEMP (24H TREND) 67 (-2) 87 (+5) 67 88
RH % (24H TREND) 100 (+7) 67 (-3) 98 59
WIND 20FT/EARLY(MPH) SE 8 SE 10 SE 9 E 11
WIND 20FT/LATE(MPH) SE 5 SE 10 SE 8 E 11
MIXING HGT(FT-AGL/MSL) 6400 6680
TRANSPORT WND (MPH) SE 10 SE 14
VENT RATE (KT-FT) 57600 80160
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-120800-
CAYEY MOUNTAIN RANGE-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30 10
TEMP (24H TREND) 70 (-1) 83 (+2) 70 84
RH % (24H TREND) 100 (+4) 70 (-5) 100 65
WIND 20FT/EARLY(MPH) SE 9 E 10 SE 9 E 13
WIND 20FT/LATE(MPH) E 9 SE 11 E 12 E 13
MIXING HGT(FT-AGL/MSL) 4830 4850
TRANSPORT WND (MPH) SE 16 E 21
VENT RATE (KT-FT) 67620 87300
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-120800-
VIEQUES-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30 20
TEMP (24H TREND) 75 (-2) 88 (+1) 76 89
RH % (24H TREND) 93 (+6) 61 (-5) 90 59
WIND 20FT/EARLY(MPH) E 16 E 14 SE 14 E 18
WIND 20FT/LATE(MPH) E 16 E 13 E 18 E 17
MIXING HGT(FT-AGL/MSL) 2910 3920
TRANSPORT WND (MPH) SE 20 E 21
VENT RATE (KT-FT) 49470 70560
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-120800-
CULEBRA-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20 20
TEMP (24H TREND) 77 (-1) 90 (+2) 77 92
RH % (24H TREND) 93 (+7) 59 (-9) 91 57
WIND 20FT/EARLY(MPH) E 16 E 14 E 13 E 18
WIND 20FT/LATE(MPH) E 16 SE 14 E 18 E 17
MIXING HGT(FT-AGL/MSL) 2830 4000
TRANSPORT WND (MPH) E 20 E 22
VENT RATE (KT-FT) 48110 76000
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-120800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20 10
TEMP (24H TREND) 74 (-2) 91 (+1) 74 92
RH % (24H TREND) 92 (+13) 51 (-5) 88 46
WIND 20FT/EARLY(MPH) E 16 E 20 E 18 E 21
WIND 20FT/LATE(MPH) E 14 SE 20 E 20 SE 24
MIXING HGT(FT-AGL/MSL) 4890 4920
TRANSPORT WND (MPH) E 20 E 25
VENT RATE (KT-FT) 83130 108240
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-120800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER MCLEAR MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 10 10
TEMP (24H TREND) 76 (-2) 86 (+1) 77 86
RH % (24H TREND) 93 (+6) 64 (-6) 91 64
WIND 20FT/EARLY(MPH) E 16 E 14 E 14 E 19
WIND 20FT/LATE(MPH) E 17 SE 16 E 18 E 18
MIXING HGT(FT-AGL/MSL) 3790 3540
TRANSPORT WND (MPH) SE 20 E 21
VENT RATE (KT-FT) 64430 63720
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-120800-
ST CROIX-
330 PM AST THU JUN 11 2026
TONIGHT FRI FRI NIGHT SAT
CLOUD COVER PCLDY MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 20 20 10 0
TEMP (24H TREND) 76 (-1) 88 (+2) 76 89
RH % (24H TREND) 92 (+1) 63 (-6) 91 61
WIND 20FT/EARLY(MPH) E 14 E 14 E 13 E 18
WIND 20FT/LATE(MPH) E 16 E 13 E 17 E 18
MIXING HGT(FT-AGL/MSL) 4460 4530
TRANSPORT WND (MPH) SE 20 E 23
VENT RATE (KT-FT) 75820 90600
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page